微信小程序——后台交互

目录

后台准备

pom.xml

配置数据源

整合mtbatis

前后端交互

 method1

 method2

---

后台准备 pom.xml <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http:// .w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.6.2</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.zking</groupId> <artifactId>minoa</artifactId> <version>0.0.1-SNAPSHOT</version> <name>minoa</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> <fastjson.version>1.2.70</fastjson.version> <jackson.version>2.9.8</jackson.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.2.1</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.44</version> <scope>runtime</scope> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>${fastjson.version}</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <excludes> <exclude> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </exclude> </excludes> </configuration> </plugin> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.2</version> <dependencies> <!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> </dependencies> <configuration> <overwrite>true</overwrite> </configuration> </plugin> </plugins> </build> </project> 配置数据源 spring: datasource: #type连接池类型 DBCP,C3P0,Hikari,Druid,默认为Hikari type: com.zaxxer.hikari.HikariDataSource driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://localhost:3306/mybatis_oapro?useUnicode=true&characterEncoding=UTF-8&useSSL=false username: root password: 123456

生成mapper接口、model实体类以及mapper映射文件

整合mtbatis mybatis: mapper-locations: classpath*:mapper/*.xml #指定mapper文件位置 type-aliases-package: com.zking.minoa.model #指定自动生成别名所在包

启动类

@MapperScan("com.zking.minoa.mapper") //指mapper接口所在包

然后启动后台即可

前后端交互  method1

首先在index.js中编写以下方法

loadMeetingInfo(){ let that=this; wx.request({ url: api.IndexUrl, dataType: 'json', success(res) { console.log(res) that.setData({ lists:res.data.data.infoList }) } }) },

然后在该页面下方生命周期函数——监听页面加载代码块下编写以下方法

onLoad(options) { this.loadMeetingInfo();//首页会议信息 },

由于后台是没有数据图片的，我们则需要在前端传入一张图片

index.wxml

<image class="video-img" mode="scaleToFill" src="{{item.image != null ? item.image : '/static/persons/1.jpg'}}"></image>  method2

封装request

utils/util.js

const formatTime = date => { const year = date.getFullYear() const month = date.getMonth() + 1 const day = date.getDate() const hour = date.getHours() const minute = date.getMinutes() const second = date.getSeconds() return `${[year, month, day].map(formatNumber).join('/')} ${[hour, minute, second].map(formatNumber).join(':')}` } const formatNumber = n => { n = n.toString() return n[1] ? n : `0${n}` } /** * 封装微信的request请求 */ function request(url, data = {}, method = "GET") { return new Promise(function (resolve, reject) { wx.request({ url: url, data: data, method: method, header: { 'Content-Type': 'application/json', }, success: function (res) { if (res.statusCode == 200) { resolve(res.data);//会把进行中改变成已成功 } else { reject(res.errMsg);//会把进行中改变成已失败 } }, fail: function (err) { reject(err) } }) }); } module.exports = { formatTime,request }

在index.js的头部引用util

const util = require("../../utils/util.js")

 编写方法

咱们先把method1的代码注释，再写method2,编写代码如下

loadMeetingInfo(){ util.request(api.IndexUrl).then(res=>{ this.setData({ lists:res.data.infoList }) }); // let that=this; // wx.request({ // url: api.IndexUrl, // dataType: 'json', // success(res) { // console.log(res) // that.setData({ // lists:res.data.data.infoList // }) // } // }) },

效果展示